The 5-Amino-1,2,3-thiadiazole, with the CAS registry number 4100-41-8 and EINECS registry number 223-868-4, is also known as 5-Amino-1,2,3-thiadiazole. It is a kind of white to light yellow crystal powder, and the molecular formula of this chemical is C₂H₃N₃S.

The physical properties of 5-Amino-1,2,3-thiadiazole are as following: (1)ACD/LogP: -0.49; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -0.49; (4)ACD/LogD (pH 7.4): -0.49; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 12.85; (8)ACD/KOC (pH 7.4): 12.85; (9)#H bond acceptors: 3; (10)#H bond donors: 2; (11)#Freely Rotating Bonds: 1; (12)Polar Surface Area: 57.26 Å²; (13)Index of Refraction: 1.662; (14)Molar Refractivity: 25.05 cm³; (15)Molar Volume: 67.6 cm³; (16)Polarizability: 9.93×10^-24cm³; (17)Surface Tension: 83.6 dyne/cm; (18)Density: 1.495 g/cm³; (19)Flash Point: 98.9 °C; (20)Enthalpy of Vaporization: 47.68 kJ/mol; (21)Boiling Point: 239.8 °C at 760 mmHg; (22)Vapour Pressure: 0.0392 mmHg at 25°C.

Preparation of 5-Amino-1,2,3-thiadiazole: This chemical can be prepared by diazoacetonitrile. The reaction will need reagents hydrogen sulfide and triethylamine, and the solvents CH₂Cl₂ and CCl₄. The reaction time is 45 minutes with temperature of -10°C, and the yield is about 73%.

You can still convert the following datas into molecular structure:
(1)SMILES: n1nsc(N)c1
(2)InChI: InChI=1/C2H3N3S/c3-2-1-4-5-6-2/h1H,3H2
(3)InChIKey: PVGHNTXQMCYYGF-UHFFFAOYAK